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除2电路 : 31 phrases in 11 subjects |
| Air defense | 2 |
| Aviation | 3 |
| Electronics | 8 |
| General | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Project management | 1 |
| Shipbuilding | 2 |
| Space | 4 |
| Technology | 6 |
| Telecommunications | 1 |
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